Pseudospectral-Method-Based Framework for Rotorcraft Stability and Trim Analysis
The paper demonstrates applications of pseudospectral-method-based framework to rotorcraft dynamics. The framework is developed to incorporate blade-to-blade symmetry (fast-Floquet) to reduce computational time. The methodology is applied to compute Floquet exponents of an isolated rotor in forward...
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Veröffentlicht in: | Journal of aircraft 2023-07, Vol.60 (4), p.1257-1271 |
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creator | Ramanujam R, Vellingiri Mohan, Ranjith |
description | The paper demonstrates applications of pseudospectral-method-based framework to rotorcraft dynamics. The framework is developed to incorporate blade-to-blade symmetry (fast-Floquet) to reduce computational time. The methodology is applied to compute Floquet exponents of an isolated rotor in forward flight using the periodic eigenvector equations, and computational performance is assessed. The framework is also applied to a trim problem that determines time-varying control input for equilibrium, as well as meets stability criteria in the form of minimum damping of the system at a prescribed value. Through the applications considered, the paper brings out the advantages of the use of the pseudospectral framework, particularly its amenability to problems that involve optimization. |
doi_str_mv | 10.2514/1.C037187 |
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The framework is developed to incorporate blade-to-blade symmetry (fast-Floquet) to reduce computational time. The methodology is applied to compute Floquet exponents of an isolated rotor in forward flight using the periodic eigenvector equations, and computational performance is assessed. The framework is also applied to a trim problem that determines time-varying control input for equilibrium, as well as meets stability criteria in the form of minimum damping of the system at a prescribed value. Through the applications considered, the paper brings out the advantages of the use of the pseudospectral framework, particularly its amenability to problems that involve optimization.</description><identifier>ISSN: 0021-8669</identifier><identifier>EISSN: 1533-3868</identifier><identifier>DOI: 10.2514/1.C037187</identifier><language>eng</language><publisher>Virginia: American Institute of Aeronautics and Astronautics</publisher><subject>Aerospace engineering ; Computing time ; Damping ; Efficiency ; Eigenvectors ; Equilibrium ; Forward flight ; Methods ; Optimization ; Rotary wing aircraft ; Stability analysis ; Stability criteria ; Symmetry ; Time varying control</subject><ispartof>Journal of aircraft, 2023-07, Vol.60 (4), p.1257-1271</ispartof><rights>Copyright © 2023 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved. All requests for copying and permission to reprint should be submitted to CCC at ; employ the eISSN to initiate your request. See also AIAA Rights and Permissions .</rights><rights>Copyright © 2023 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved. All requests for copying and permission to reprint should be submitted to CCC at www.copyright.com; employ the eISSN 1533-3868 to initiate your request. 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Through the applications considered, the paper brings out the advantages of the use of the pseudospectral framework, particularly its amenability to problems that involve optimization.</description><subject>Aerospace engineering</subject><subject>Computing time</subject><subject>Damping</subject><subject>Efficiency</subject><subject>Eigenvectors</subject><subject>Equilibrium</subject><subject>Forward flight</subject><subject>Methods</subject><subject>Optimization</subject><subject>Rotary wing aircraft</subject><subject>Stability analysis</subject><subject>Stability criteria</subject><subject>Symmetry</subject><subject>Time varying control</subject><issn>0021-8669</issn><issn>1533-3868</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2023</creationdate><recordtype>article</recordtype><recordid>eNpl0M1KAzEUBeAgCtbqwjcICIKL1Nzc-UmWtVgVKhbtPqRJBqdOm5qkSN_ekQouXF0ufBwOh5BL4CNRQnELownHGmR9RAZQIjKUlTwmA84FMFlV6pScpbTinEte1wMynye_cyFtvc3RdOzZ5_fg2J1J3tFpNGv_FeIHbUKkryGHaKNpMn3LZtl2bd5Ts3F0Eds1HW9Mt09tOicnjemSv_i9Q7KY3i8mj2z28vA0Gc-YEYXMTEqrVGUlctn_lTIOwJYNIF8qL4VTpRXolhV6UIDO1SgFWLQeC6wbgUNydYjdxvC58ynrVdjFvkPSQhYKy0pI3qubg7IxpBR9o7d9VxP3Grj-2UuD_t2rt9cHa1pj_tL-w28dRGeW</recordid><startdate>20230701</startdate><enddate>20230701</enddate><creator>Ramanujam R, Vellingiri</creator><creator>Mohan, Ranjith</creator><general>American Institute of Aeronautics and Astronautics</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TB</scope><scope>8FD</scope><scope>FR3</scope><scope>H8D</scope><scope>L7M</scope><scope>U9A</scope><orcidid>https://orcid.org/0000-0003-4574-6159</orcidid></search><sort><creationdate>20230701</creationdate><title>Pseudospectral-Method-Based Framework for Rotorcraft Stability and Trim Analysis</title><author>Ramanujam R, Vellingiri ; Mohan, Ranjith</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a248t-88c996c830824869ad11c5f130b9e82d95c23db63e1913dd73821c3ce3437f23</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2023</creationdate><topic>Aerospace engineering</topic><topic>Computing time</topic><topic>Damping</topic><topic>Efficiency</topic><topic>Eigenvectors</topic><topic>Equilibrium</topic><topic>Forward flight</topic><topic>Methods</topic><topic>Optimization</topic><topic>Rotary wing aircraft</topic><topic>Stability analysis</topic><topic>Stability criteria</topic><topic>Symmetry</topic><topic>Time varying control</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Ramanujam R, Vellingiri</creatorcontrib><creatorcontrib>Mohan, Ranjith</creatorcontrib><collection>CrossRef</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Journal of aircraft</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Ramanujam R, Vellingiri</au><au>Mohan, Ranjith</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Pseudospectral-Method-Based Framework for Rotorcraft Stability and Trim Analysis</atitle><jtitle>Journal of aircraft</jtitle><date>2023-07-01</date><risdate>2023</risdate><volume>60</volume><issue>4</issue><spage>1257</spage><epage>1271</epage><pages>1257-1271</pages><issn>0021-8669</issn><eissn>1533-3868</eissn><abstract>The paper demonstrates applications of pseudospectral-method-based framework to rotorcraft dynamics. 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subjects | Aerospace engineering Computing time Damping Efficiency Eigenvectors Equilibrium Forward flight Methods Optimization Rotary wing aircraft Stability analysis Stability criteria Symmetry Time varying control |
title | Pseudospectral-Method-Based Framework for Rotorcraft Stability and Trim Analysis |
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